root / hw / usb-audio.c @ 079d0b7f
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/*
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* QEMU USB audio device
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*
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* written by:
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* H. Peter Anvin <hpa@linux.intel.com>
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* Gerd Hoffmann <kraxel@redhat.com>
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*
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* lousely based on usb net device code which is:
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*
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* Copyright (c) 2006 Thomas Sailer
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* Copyright (c) 2008 Andrzej Zaborowski
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h" |
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#include "usb.h" |
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#include "usb-desc.h" |
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#include "hw.h" |
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#include "audiodev.h" |
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#include "audio/audio.h" |
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|
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#define USBAUDIO_VENDOR_NUM 0x46f4 /* CRC16() of "QEMU" */ |
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#define USBAUDIO_PRODUCT_NUM 0x0002 |
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|
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#define DEV_CONFIG_VALUE 1 /* The one and only */ |
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|
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/* Descriptor subtypes for AC interfaces */
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#define DST_AC_HEADER 1 |
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#define DST_AC_INPUT_TERMINAL 2 |
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#define DST_AC_OUTPUT_TERMINAL 3 |
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#define DST_AC_FEATURE_UNIT 6 |
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/* Descriptor subtypes for AS interfaces */
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#define DST_AS_GENERAL 1 |
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#define DST_AS_FORMAT_TYPE 2 |
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/* Descriptor subtypes for endpoints */
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#define DST_EP_GENERAL 1 |
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|
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enum usb_audio_strings {
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STRING_NULL, |
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STRING_MANUFACTURER, |
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STRING_PRODUCT, |
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STRING_SERIALNUMBER, |
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STRING_CONFIG, |
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STRING_USBAUDIO_CONTROL, |
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STRING_INPUT_TERMINAL, |
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STRING_FEATURE_UNIT, |
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STRING_OUTPUT_TERMINAL, |
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STRING_NULL_STREAM, |
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STRING_REAL_STREAM, |
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}; |
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|
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static const USBDescStrings usb_audio_stringtable = { |
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[STRING_MANUFACTURER] = "QEMU",
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[STRING_PRODUCT] = "QEMU USB Audio",
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[STRING_SERIALNUMBER] = "1",
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[STRING_CONFIG] = "Audio Configuration",
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[STRING_USBAUDIO_CONTROL] = "Audio Device",
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[STRING_INPUT_TERMINAL] = "Audio Output Pipe",
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[STRING_FEATURE_UNIT] = "Audio Output Volume Control",
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[STRING_OUTPUT_TERMINAL] = "Audio Output Terminal",
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[STRING_NULL_STREAM] = "Audio Output - Disabled",
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[STRING_REAL_STREAM] = "Audio Output - 48 kHz Stereo",
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}; |
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|
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#define U16(x) ((x) & 0xff), (((x) >> 8) & 0xff) |
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#define U24(x) U16(x), (((x) >> 16) & 0xff) |
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#define U32(x) U24(x), (((x) >> 24) & 0xff) |
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|
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/*
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* A Basic Audio Device uses these specific values
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*/
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#define USBAUDIO_PACKET_SIZE 192 |
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#define USBAUDIO_SAMPLE_RATE 48000 |
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#define USBAUDIO_PACKET_INTERVAL 1 |
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|
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static const USBDescIface desc_iface[] = { |
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{
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.bInterfaceNumber = 0,
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.bNumEndpoints = 0,
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.bInterfaceClass = USB_CLASS_AUDIO, |
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.bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL, |
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.bInterfaceProtocol = 0x04,
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.iInterface = STRING_USBAUDIO_CONTROL, |
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.ndesc = 4,
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.descs = (USBDescOther[]) {
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{
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/* Headphone Class-Specific AC Interface Header Descriptor */
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.data = (uint8_t[]) {
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0x09, /* u8 bLength */ |
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AC_HEADER, /* u8 bDescriptorSubtype */
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U16(0x0100), /* u16 bcdADC */ |
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U16(0x2b), /* u16 wTotalLength */ |
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0x01, /* u8 bInCollection */ |
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0x01, /* u8 baInterfaceNr */ |
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} |
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},{
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/* Generic Stereo Input Terminal ID1 Descriptor */
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.data = (uint8_t[]) {
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0x0c, /* u8 bLength */ |
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AC_INPUT_TERMINAL, /* u8 bDescriptorSubtype */
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0x01, /* u8 bTerminalID */ |
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U16(0x0101), /* u16 wTerminalType */ |
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0x00, /* u8 bAssocTerminal */ |
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0x02, /* u16 bNrChannels */ |
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U16(0x0003), /* u16 wChannelConfig */ |
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0x00, /* u8 iChannelNames */ |
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STRING_INPUT_TERMINAL, /* u8 iTerminal */
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} |
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},{
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/* Generic Stereo Feature Unit ID2 Descriptor */
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.data = (uint8_t[]) {
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0x0d, /* u8 bLength */ |
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AC_FEATURE_UNIT, /* u8 bDescriptorSubtype */
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0x02, /* u8 bUnitID */ |
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0x01, /* u8 bSourceID */ |
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0x02, /* u8 bControlSize */ |
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U16(0x0001), /* u16 bmaControls(0) */ |
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U16(0x0002), /* u16 bmaControls(1) */ |
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U16(0x0002), /* u16 bmaControls(2) */ |
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STRING_FEATURE_UNIT, /* u8 iFeature */
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} |
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},{
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/* Headphone Ouptut Terminal ID3 Descriptor */
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.data = (uint8_t[]) {
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0x09, /* u8 bLength */ |
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AC_OUTPUT_TERMINAL, /* u8 bDescriptorSubtype */
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0x03, /* u8 bUnitID */ |
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U16(0x0301), /* u16 wTerminalType (SPK) */ |
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0x00, /* u8 bAssocTerminal */ |
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0x02, /* u8 bSourceID */ |
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STRING_OUTPUT_TERMINAL, /* u8 iTerminal */
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} |
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} |
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}, |
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},{
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.bInterfaceNumber = 1,
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.bAlternateSetting = 0,
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.bNumEndpoints = 0,
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.bInterfaceClass = USB_CLASS_AUDIO, |
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.bInterfaceSubClass = USB_SUBCLASS_AUDIO_STREAMING, |
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.iInterface = STRING_NULL_STREAM, |
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},{
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.bInterfaceNumber = 1,
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.bAlternateSetting = 1,
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.bNumEndpoints = 1,
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.bInterfaceClass = USB_CLASS_AUDIO, |
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.bInterfaceSubClass = USB_SUBCLASS_AUDIO_STREAMING, |
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.iInterface = STRING_REAL_STREAM, |
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.ndesc = 2,
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.descs = (USBDescOther[]) {
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{
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/* Headphone Class-specific AS General Interface Descriptor */
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.data = (uint8_t[]) {
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0x07, /* u8 bLength */ |
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AS_GENERAL, /* u8 bDescriptorSubtype */
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0x01, /* u8 bTerminalLink */ |
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0x00, /* u8 bDelay */ |
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0x01, 0x00, /* u16 wFormatTag */ |
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} |
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},{
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/* Headphone Type I Format Type Descriptor */
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.data = (uint8_t[]) {
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0x0b, /* u8 bLength */ |
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USB_DT_CS_INTERFACE, /* u8 bDescriptorType */
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DST_AS_FORMAT_TYPE, /* u8 bDescriptorSubtype */
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0x01, /* u8 bFormatType */ |
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0x02, /* u8 bNrChannels */ |
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0x02, /* u8 bSubFrameSize */ |
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0x10, /* u8 bBitResolution */ |
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0x01, /* u8 bSamFreqType */ |
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U24(USBAUDIO_SAMPLE_RATE), /* u24 tSamFreq */
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} |
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} |
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}, |
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.eps = (USBDescEndpoint[]) {
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{
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.bEndpointAddress = USB_DIR_OUT | 0x01,
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.bmAttributes = 0x0d,
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.wMaxPacketSize = USBAUDIO_PACKET_SIZE, |
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.bInterval = 1,
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.is_audio = 1,
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/* Stereo Headphone Class-specific
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AS Audio Data Endpoint Descriptor */
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.extra = (uint8_t[]) {
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0x07, /* u8 bLength */ |
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USB_DT_CS_ENDPOINT, /* u8 bDescriptorType */
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DST_EP_GENERAL, /* u8 bDescriptorSubtype */
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0x00, /* u8 bmAttributes */ |
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0x00, /* u8 bLockDelayUnits */ |
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U16(0x0000), /* u16 wLockDelay */ |
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}, |
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}, |
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} |
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} |
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}; |
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static const USBDescDevice desc_device = { |
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.bcdUSB = 0x0200,
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.bMaxPacketSize0 = 64,
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.bNumConfigurations = 1,
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.confs = (USBDescConfig[]) {
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{
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.bNumInterfaces = 2,
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.bConfigurationValue = DEV_CONFIG_VALUE, |
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.iConfiguration = STRING_CONFIG, |
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.bmAttributes = 0xc0,
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.bMaxPower = 0x32,
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.nif = ARRAY_SIZE(desc_iface), |
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.ifs = desc_iface, |
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}, |
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}, |
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}; |
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static const USBDesc desc_audio = { |
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.id = {
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.idVendor = USBAUDIO_VENDOR_NUM, |
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.idProduct = USBAUDIO_PRODUCT_NUM, |
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.bcdDevice = 0,
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.iManufacturer = STRING_MANUFACTURER, |
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.iProduct = STRING_PRODUCT, |
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.iSerialNumber = STRING_SERIALNUMBER, |
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}, |
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.full = &desc_device, |
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.str = usb_audio_stringtable, |
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}; |
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|
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/*
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* A USB audio device supports an arbitrary number of alternate
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* interface settings for each interface. Each corresponds to a block
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* diagram of parameterized blocks. This can thus refer to things like
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* number of channels, data rates, or in fact completely different
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* block diagrams. Alternative setting 0 is always the null block diagram,
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* which is used by a disabled device.
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*/
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enum usb_audio_altset {
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ALTSET_OFF = 0x00, /* No endpoint */ |
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ALTSET_ON = 0x01, /* Single endpoint */ |
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}; |
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/*
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* Class-specific control requests
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*/
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#define CR_SET_CUR 0x01 |
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#define CR_GET_CUR 0x81 |
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#define CR_SET_MIN 0x02 |
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#define CR_GET_MIN 0x82 |
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#define CR_SET_MAX 0x03 |
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#define CR_GET_MAX 0x83 |
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#define CR_SET_RES 0x04 |
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#define CR_GET_RES 0x84 |
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#define CR_SET_MEM 0x05 |
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#define CR_GET_MEM 0x85 |
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#define CR_GET_STAT 0xff |
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|
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/*
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* Feature Unit Control Selectors
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*/
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#define MUTE_CONTROL 0x01 |
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#define VOLUME_CONTROL 0x02 |
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#define BASS_CONTROL 0x03 |
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#define MID_CONTROL 0x04 |
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#define TREBLE_CONTROL 0x05 |
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#define GRAPHIC_EQUALIZER_CONTROL 0x06 |
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#define AUTOMATIC_GAIN_CONTROL 0x07 |
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#define DELAY_CONTROL 0x08 |
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#define BASS_BOOST_CONTROL 0x09 |
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#define LOUDNESS_CONTROL 0x0a |
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|
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/*
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* buffering
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*/
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|
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struct streambuf {
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uint8_t *data; |
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uint32_t size; |
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uint32_t prod; |
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uint32_t cons; |
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}; |
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|
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static void streambuf_init(struct streambuf *buf, uint32_t size) |
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{
|
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g_free(buf->data); |
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buf->size = size - (size % USBAUDIO_PACKET_SIZE); |
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buf->data = g_malloc(buf->size); |
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buf->prod = 0;
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buf->cons = 0;
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} |
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|
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static void streambuf_fini(struct streambuf *buf) |
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{
|
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g_free(buf->data); |
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buf->data = NULL;
|
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} |
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|
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static int streambuf_put(struct streambuf *buf, USBPacket *p) |
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{
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uint32_t free = buf->size - (buf->prod - buf->cons); |
| 320 |
|
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if (!free) {
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return 0; |
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} |
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assert(free >= USBAUDIO_PACKET_SIZE); |
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usb_packet_copy(p, buf->data + (buf->prod % buf->size), |
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USBAUDIO_PACKET_SIZE); |
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buf->prod += USBAUDIO_PACKET_SIZE; |
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return USBAUDIO_PACKET_SIZE;
|
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} |
| 330 |
|
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static uint8_t *streambuf_get(struct streambuf *buf) |
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{
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uint32_t used = buf->prod - buf->cons; |
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uint8_t *data; |
| 335 |
|
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if (!used) {
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return NULL; |
| 338 |
} |
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assert(used >= USBAUDIO_PACKET_SIZE); |
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data = buf->data + (buf->cons % buf->size); |
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buf->cons += USBAUDIO_PACKET_SIZE; |
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return data;
|
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} |
| 344 |
|
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typedef struct USBAudioState { |
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/* qemu interfaces */
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USBDevice dev; |
| 348 |
QEMUSoundCard card; |
| 349 |
|
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/* state */
|
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struct {
|
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enum usb_audio_altset altset;
|
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struct audsettings as;
|
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SWVoiceOut *voice; |
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bool mute;
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uint8_t vol[2];
|
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struct streambuf buf;
|
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} out; |
| 359 |
|
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/* properties */
|
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uint32_t debug; |
| 362 |
uint32_t buffer; |
| 363 |
} USBAudioState; |
| 364 |
|
| 365 |
static void output_callback(void *opaque, int avail) |
| 366 |
{
|
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USBAudioState *s = opaque; |
| 368 |
uint8_t *data; |
| 369 |
|
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for (;;) {
|
| 371 |
if (avail < USBAUDIO_PACKET_SIZE) {
|
| 372 |
return;
|
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} |
| 374 |
data = streambuf_get(&s->out.buf); |
| 375 |
if (NULL == data) { |
| 376 |
return;
|
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} |
| 378 |
AUD_write(s->out.voice, data, USBAUDIO_PACKET_SIZE); |
| 379 |
avail -= USBAUDIO_PACKET_SIZE; |
| 380 |
} |
| 381 |
} |
| 382 |
|
| 383 |
static int usb_audio_set_output_altset(USBAudioState *s, int altset) |
| 384 |
{
|
| 385 |
switch (altset) {
|
| 386 |
case ALTSET_OFF:
|
| 387 |
streambuf_init(&s->out.buf, s->buffer); |
| 388 |
AUD_set_active_out(s->out.voice, false);
|
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break;
|
| 390 |
case ALTSET_ON:
|
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AUD_set_active_out(s->out.voice, true);
|
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break;
|
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default:
|
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return -1; |
| 395 |
} |
| 396 |
|
| 397 |
if (s->debug) {
|
| 398 |
fprintf(stderr, "usb-audio: set interface %d\n", altset);
|
| 399 |
} |
| 400 |
s->out.altset = altset; |
| 401 |
return 0; |
| 402 |
} |
| 403 |
|
| 404 |
/*
|
| 405 |
* Note: we arbitrarily map the volume control range onto -inf..+8 dB
|
| 406 |
*/
|
| 407 |
#define ATTRIB_ID(cs, attrib, idif) \
|
| 408 |
(((cs) << 24) | ((attrib) << 16) | (idif)) |
| 409 |
|
| 410 |
static int usb_audio_get_control(USBAudioState *s, uint8_t attrib, |
| 411 |
uint16_t cscn, uint16_t idif, |
| 412 |
int length, uint8_t *data)
|
| 413 |
{
|
| 414 |
uint8_t cs = cscn >> 8;
|
| 415 |
uint8_t cn = cscn - 1; /* -1 for the non-present master control */ |
| 416 |
uint32_t aid = ATTRIB_ID(cs, attrib, idif); |
| 417 |
int ret = USB_RET_STALL;
|
| 418 |
|
| 419 |
switch (aid) {
|
| 420 |
case ATTRIB_ID(MUTE_CONTROL, CR_GET_CUR, 0x0200): |
| 421 |
data[0] = s->out.mute;
|
| 422 |
ret = 1;
|
| 423 |
break;
|
| 424 |
case ATTRIB_ID(VOLUME_CONTROL, CR_GET_CUR, 0x0200): |
| 425 |
if (cn < 2) { |
| 426 |
uint16_t vol = (s->out.vol[cn] * 0x8800 + 127) / 255 + 0x8000; |
| 427 |
data[0] = vol;
|
| 428 |
data[1] = vol >> 8; |
| 429 |
ret = 2;
|
| 430 |
} |
| 431 |
break;
|
| 432 |
case ATTRIB_ID(VOLUME_CONTROL, CR_GET_MIN, 0x0200): |
| 433 |
if (cn < 2) { |
| 434 |
data[0] = 0x01; |
| 435 |
data[1] = 0x80; |
| 436 |
ret = 2;
|
| 437 |
} |
| 438 |
break;
|
| 439 |
case ATTRIB_ID(VOLUME_CONTROL, CR_GET_MAX, 0x0200): |
| 440 |
if (cn < 2) { |
| 441 |
data[0] = 0x00; |
| 442 |
data[1] = 0x08; |
| 443 |
ret = 2;
|
| 444 |
} |
| 445 |
break;
|
| 446 |
case ATTRIB_ID(VOLUME_CONTROL, CR_GET_RES, 0x0200): |
| 447 |
if (cn < 2) { |
| 448 |
data[0] = 0x88; |
| 449 |
data[1] = 0x00; |
| 450 |
ret = 2;
|
| 451 |
} |
| 452 |
break;
|
| 453 |
} |
| 454 |
|
| 455 |
return ret;
|
| 456 |
} |
| 457 |
static int usb_audio_set_control(USBAudioState *s, uint8_t attrib, |
| 458 |
uint16_t cscn, uint16_t idif, |
| 459 |
int length, uint8_t *data)
|
| 460 |
{
|
| 461 |
uint8_t cs = cscn >> 8;
|
| 462 |
uint8_t cn = cscn - 1; /* -1 for the non-present master control */ |
| 463 |
uint32_t aid = ATTRIB_ID(cs, attrib, idif); |
| 464 |
int ret = USB_RET_STALL;
|
| 465 |
bool set_vol = false; |
| 466 |
|
| 467 |
switch (aid) {
|
| 468 |
case ATTRIB_ID(MUTE_CONTROL, CR_SET_CUR, 0x0200): |
| 469 |
s->out.mute = data[0] & 1; |
| 470 |
set_vol = true;
|
| 471 |
ret = 0;
|
| 472 |
break;
|
| 473 |
case ATTRIB_ID(VOLUME_CONTROL, CR_SET_CUR, 0x0200): |
| 474 |
if (cn < 2) { |
| 475 |
uint16_t vol = data[0] + (data[1] << 8); |
| 476 |
|
| 477 |
if (s->debug) {
|
| 478 |
fprintf(stderr, "usb-audio: vol %04x\n", (uint16_t)vol);
|
| 479 |
} |
| 480 |
|
| 481 |
vol -= 0x8000;
|
| 482 |
vol = (vol * 255 + 0x4400) / 0x8800; |
| 483 |
if (vol > 255) { |
| 484 |
vol = 255;
|
| 485 |
} |
| 486 |
|
| 487 |
s->out.vol[cn] = vol; |
| 488 |
set_vol = true;
|
| 489 |
ret = 0;
|
| 490 |
} |
| 491 |
break;
|
| 492 |
} |
| 493 |
|
| 494 |
if (set_vol) {
|
| 495 |
if (s->debug) {
|
| 496 |
fprintf(stderr, "usb-audio: mute %d, lvol %3d, rvol %3d\n",
|
| 497 |
s->out.mute, s->out.vol[0], s->out.vol[1]); |
| 498 |
} |
| 499 |
AUD_set_volume_out(s->out.voice, s->out.mute, |
| 500 |
s->out.vol[0], s->out.vol[1]); |
| 501 |
} |
| 502 |
|
| 503 |
return ret;
|
| 504 |
} |
| 505 |
|
| 506 |
static int usb_audio_handle_control(USBDevice *dev, USBPacket *p, |
| 507 |
int request, int value, int index, |
| 508 |
int length, uint8_t *data)
|
| 509 |
{
|
| 510 |
USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev); |
| 511 |
int ret = 0; |
| 512 |
|
| 513 |
if (s->debug) {
|
| 514 |
fprintf(stderr, "usb-audio: control transaction: "
|
| 515 |
"request 0x%04x value 0x%04x index 0x%04x length 0x%04x\n",
|
| 516 |
request, value, index, length); |
| 517 |
} |
| 518 |
|
| 519 |
ret = usb_desc_handle_control(dev, p, request, value, index, length, data); |
| 520 |
if (ret >= 0) { |
| 521 |
return ret;
|
| 522 |
} |
| 523 |
|
| 524 |
switch (request) {
|
| 525 |
case ClassInterfaceRequest | CR_GET_CUR:
|
| 526 |
case ClassInterfaceRequest | CR_GET_MIN:
|
| 527 |
case ClassInterfaceRequest | CR_GET_MAX:
|
| 528 |
case ClassInterfaceRequest | CR_GET_RES:
|
| 529 |
ret = usb_audio_get_control(s, request & 0xff, value, index,
|
| 530 |
length, data); |
| 531 |
if (ret < 0) { |
| 532 |
if (s->debug) {
|
| 533 |
fprintf(stderr, "usb-audio: fail: get control\n");
|
| 534 |
} |
| 535 |
goto fail;
|
| 536 |
} |
| 537 |
break;
|
| 538 |
|
| 539 |
case ClassInterfaceOutRequest | CR_SET_CUR:
|
| 540 |
case ClassInterfaceOutRequest | CR_SET_MIN:
|
| 541 |
case ClassInterfaceOutRequest | CR_SET_MAX:
|
| 542 |
case ClassInterfaceOutRequest | CR_SET_RES:
|
| 543 |
ret = usb_audio_set_control(s, request & 0xff, value, index,
|
| 544 |
length, data); |
| 545 |
if (ret < 0) { |
| 546 |
if (s->debug) {
|
| 547 |
fprintf(stderr, "usb-audio: fail: set control\n");
|
| 548 |
} |
| 549 |
goto fail;
|
| 550 |
} |
| 551 |
break;
|
| 552 |
|
| 553 |
default:
|
| 554 |
fail:
|
| 555 |
if (s->debug) {
|
| 556 |
fprintf(stderr, "usb-audio: failed control transaction: "
|
| 557 |
"request 0x%04x value 0x%04x index 0x%04x length 0x%04x\n",
|
| 558 |
request, value, index, length); |
| 559 |
} |
| 560 |
ret = USB_RET_STALL; |
| 561 |
break;
|
| 562 |
} |
| 563 |
return ret;
|
| 564 |
} |
| 565 |
|
| 566 |
static void usb_audio_set_interface(USBDevice *dev, int iface, |
| 567 |
int old, int value) |
| 568 |
{
|
| 569 |
USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev); |
| 570 |
|
| 571 |
if (iface == 1) { |
| 572 |
usb_audio_set_output_altset(s, value); |
| 573 |
} |
| 574 |
} |
| 575 |
|
| 576 |
static void usb_audio_handle_reset(USBDevice *dev) |
| 577 |
{
|
| 578 |
USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev); |
| 579 |
|
| 580 |
if (s->debug) {
|
| 581 |
fprintf(stderr, "usb-audio: reset\n");
|
| 582 |
} |
| 583 |
usb_audio_set_output_altset(s, ALTSET_OFF); |
| 584 |
} |
| 585 |
|
| 586 |
static int usb_audio_handle_dataout(USBAudioState *s, USBPacket *p) |
| 587 |
{
|
| 588 |
int rc;
|
| 589 |
|
| 590 |
if (s->out.altset == ALTSET_OFF) {
|
| 591 |
return USB_RET_STALL;
|
| 592 |
} |
| 593 |
|
| 594 |
rc = streambuf_put(&s->out.buf, p); |
| 595 |
if (rc < p->iov.size && s->debug > 1) { |
| 596 |
fprintf(stderr, "usb-audio: output overrun (%zd bytes)\n",
|
| 597 |
p->iov.size - rc); |
| 598 |
} |
| 599 |
|
| 600 |
return 0; |
| 601 |
} |
| 602 |
|
| 603 |
static int usb_audio_handle_data(USBDevice *dev, USBPacket *p) |
| 604 |
{
|
| 605 |
USBAudioState *s = (USBAudioState *) dev; |
| 606 |
int ret = 0; |
| 607 |
|
| 608 |
switch (p->pid) {
|
| 609 |
case USB_TOKEN_OUT:
|
| 610 |
switch (p->ep->nr) {
|
| 611 |
case 1: |
| 612 |
ret = usb_audio_handle_dataout(s, p); |
| 613 |
break;
|
| 614 |
default:
|
| 615 |
goto fail;
|
| 616 |
} |
| 617 |
break;
|
| 618 |
|
| 619 |
default:
|
| 620 |
fail:
|
| 621 |
ret = USB_RET_STALL; |
| 622 |
break;
|
| 623 |
} |
| 624 |
if (ret == USB_RET_STALL && s->debug) {
|
| 625 |
fprintf(stderr, "usb-audio: failed data transaction: "
|
| 626 |
"pid 0x%x ep 0x%x len 0x%zx\n",
|
| 627 |
p->pid, p->ep->nr, p->iov.size); |
| 628 |
} |
| 629 |
return ret;
|
| 630 |
} |
| 631 |
|
| 632 |
static void usb_audio_handle_destroy(USBDevice *dev) |
| 633 |
{
|
| 634 |
USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev); |
| 635 |
|
| 636 |
if (s->debug) {
|
| 637 |
fprintf(stderr, "usb-audio: destroy\n");
|
| 638 |
} |
| 639 |
|
| 640 |
usb_audio_set_output_altset(s, ALTSET_OFF); |
| 641 |
AUD_close_out(&s->card, s->out.voice); |
| 642 |
AUD_remove_card(&s->card); |
| 643 |
|
| 644 |
streambuf_fini(&s->out.buf); |
| 645 |
} |
| 646 |
|
| 647 |
static int usb_audio_initfn(USBDevice *dev) |
| 648 |
{
|
| 649 |
USBAudioState *s = DO_UPCAST(USBAudioState, dev, dev); |
| 650 |
|
| 651 |
usb_desc_init(dev); |
| 652 |
s->dev.opaque = s; |
| 653 |
AUD_register_card("usb-audio", &s->card);
|
| 654 |
|
| 655 |
s->out.altset = ALTSET_OFF; |
| 656 |
s->out.mute = false;
|
| 657 |
s->out.vol[0] = 240; /* 0 dB */ |
| 658 |
s->out.vol[1] = 240; /* 0 dB */ |
| 659 |
s->out.as.freq = USBAUDIO_SAMPLE_RATE; |
| 660 |
s->out.as.nchannels = 2;
|
| 661 |
s->out.as.fmt = AUD_FMT_S16; |
| 662 |
s->out.as.endianness = 0;
|
| 663 |
streambuf_init(&s->out.buf, s->buffer); |
| 664 |
|
| 665 |
s->out.voice = AUD_open_out(&s->card, s->out.voice, "usb-audio",
|
| 666 |
s, output_callback, &s->out.as); |
| 667 |
AUD_set_volume_out(s->out.voice, s->out.mute, s->out.vol[0], s->out.vol[1]); |
| 668 |
AUD_set_active_out(s->out.voice, 0);
|
| 669 |
return 0; |
| 670 |
} |
| 671 |
|
| 672 |
static const VMStateDescription vmstate_usb_audio = { |
| 673 |
.name = "usb-audio",
|
| 674 |
.unmigratable = 1,
|
| 675 |
}; |
| 676 |
|
| 677 |
static Property usb_audio_properties[] = {
|
| 678 |
DEFINE_PROP_UINT32("debug", USBAudioState, debug, 0), |
| 679 |
DEFINE_PROP_UINT32("buffer", USBAudioState, buffer,
|
| 680 |
8 * USBAUDIO_PACKET_SIZE),
|
| 681 |
DEFINE_PROP_END_OF_LIST(), |
| 682 |
}; |
| 683 |
|
| 684 |
static void usb_audio_class_init(ObjectClass *klass, void *data) |
| 685 |
{
|
| 686 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 687 |
USBDeviceClass *k = USB_DEVICE_CLASS(klass); |
| 688 |
|
| 689 |
dc->vmsd = &vmstate_usb_audio; |
| 690 |
dc->props = usb_audio_properties; |
| 691 |
k->product_desc = "QEMU USB Audio Interface";
|
| 692 |
k->usb_desc = &desc_audio; |
| 693 |
k->init = usb_audio_initfn; |
| 694 |
k->handle_reset = usb_audio_handle_reset; |
| 695 |
k->handle_control = usb_audio_handle_control; |
| 696 |
k->handle_data = usb_audio_handle_data; |
| 697 |
k->handle_destroy = usb_audio_handle_destroy; |
| 698 |
k->set_interface = usb_audio_set_interface; |
| 699 |
} |
| 700 |
|
| 701 |
static TypeInfo usb_audio_info = {
|
| 702 |
.name = "usb-audio",
|
| 703 |
.parent = TYPE_USB_DEVICE, |
| 704 |
.instance_size = sizeof(USBAudioState),
|
| 705 |
.class_init = usb_audio_class_init, |
| 706 |
}; |
| 707 |
|
| 708 |
static void usb_audio_register_devices(void) |
| 709 |
{
|
| 710 |
type_register_static(&usb_audio_info); |
| 711 |
usb_legacy_register("usb-audio", "audio", NULL); |
| 712 |
} |
| 713 |
|
| 714 |
device_init(usb_audio_register_devices) |